AC swing head with replaceable spindle motor

Abstract

The AC swing head comprises a swing head frame, a C-axis barrel and an A-axis rotating body, the C-axis barrel and the A-axis rotating body are arranged on the swing head frame, one end of the A-axis rotating body is concaved inwards to form a mounting cavity, and a motor holder, the spindle motor, a fan and a temperature sensor are arranged in the mounting cavity. The AC swing head has the beneficial effects that the fan is arranged in the AC swing head, air cooling is conducted on the spindle motor through the fan, when the spindle motor works for a long time and the temperature of a machine body is high, the AC swing head can automatically replace the spindle motor to continue to work, too much machining time is not delayed, and the influence on the machining efficiency of a machine tool is small; due to the fact that the AC swing head adopts the structural design mode that the main shaft motor can be automatically replaced, the main shaft motor does not need to be provided with a water-cooling or air-cooling cooling structure, maintenance is easy and convenient, time and labor are saved, and labor cost is low.

Description

Technical Field

[0001] The invention relates to the field of AC swing heads, and in particular to an AC swing head with a replaceable spindle motor. Background Art

[0002] The AC swing head is the core functional component of the five-axis linkage CNC machine tool. It is mainly used to control the direction of the tool axis. The AC swing head usually includes the A-axis, C-axis and spindle motor. The A-axis and C-axis are set vertically and directly driven by the torque motor to achieve high-precision angle adjustment of the tool. The spindle motor is vertically connected to the A-axis and rotates around the A-axis. The spindle motor is used to drive the tool to rotate at high speed to process the product. The AC swing head plays an important role in complex surface processing, especially in the fields of aerospace, automotive molds, etc. It is widely used.

[0003] At present, the spindle motor on the AC swing head generally adopts liquid cooling to ensure the long-term stable and normal operation of the spindle motor, thereby maximizing the processing efficiency of the machine tool and avoiding delays in processing time due to spindle motor overheating shutdown protection; compared with the air cooling method of the spindle motor, the liquid cooling of the spindle motor has a better cooling effect than air cooling, and the motor running noise is smaller than air cooling.

[0004] However, liquid-cooled spindle motors are not perfect. Liquid-cooled spindle motors need to be regularly replenished with coolant, and regularly inspected, maintained, and replaced with wearing parts such as coolant channels, pipes, pipe joints, and water pumps, and scale deposits need to be removed to avoid coolant leakage and the occurrence of problems such as scale deposits affecting the circulation of coolant and reducing the cooling effect on the spindle motor. Because the spindle motor itself also needs to be regularly disassembled for maintenance, clean the metal chips, dust and other powder particles on the shaft and apply lubricating grease, and the pipe joints need to be disassembled before removing the spindle motor. Repeated disassembly and assembly of the spindle motor is bound to cause the sealing performance of the pipe joints in the cooling pipeline to deteriorate, resulting in coolant leakage. The scale deposits are hard in texture and located deep in the inner wall of the pipe, so they cannot be removed by physical means and can only be cleaned chemically with the help of descaling agents. Descaling agents, especially acidic descaling agents used to clean scale, are generally corrosive to metal pipes. Over time, the life of the coolant channels and pipes is bound to decrease.

[0005] It can be seen that the maintenance of the spindle motor using liquid cooling is troublesome, time-consuming and labor-intensive. At the same time, the aforementioned maintenance work can only be completed manually, which costs a lot of manpower. Summary of the invention

[0006] The main purpose of the present invention is to provide an AC swing head with a replaceable spindle motor, aiming to solve the problems mentioned in the above background technology.

[0007] In order to solve the above problems, the present invention proposes an AC swing head with a replaceable spindle motor, comprising a swing head frame, a C-axis cylinder and an A-axis rotating body arranged on the swing head frame, one end of the A-axis rotating body is recessed inward to form an installation cavity, and a motor holder, a spindle motor, a fan and a temperature sensor are arranged in the installation cavity; The motor holder is fixedly connected to the inner wall of the installation cavity; The spindle motor passes through the motor holder and is coaxial with the motor holder. The spindle motor and the motor holder are detachably fixedly connected. The spindle motor is detachably electrically connected to the A-axis rotating body. The fan blows air toward the spindle motor to cool the spindle motor; The temperature sensor is in contact with the spindle motor and is used for detecting the working temperature of the spindle motor.

[0008] In one embodiment, the motor holder comprises: A pair of coaxial and spaced mounting rings, each mounting ring having a side surface facing the other mounting ring provided with an annular groove coaxial with the mounting ring, a driving ring self-rotatingly mounted in the annular groove, the driving ring and the mounting ring being coaxial, a spiral groove being provided on an end surface of the driving ring close to the bottom of the annular groove, the spiral groove being coaxial with the driving ring; Slider 1 is radially slidable along the mounting ring and is installed in the mounting ring. Slider 2 is fixed on the slider 1. Slider 2 is located in the spiral groove and is slidably connected with the spiral groove. The driving ring rotates to make slider 2 slide along the spiral groove and drive slider 1 to slide radially along the mounting ring. A clamping groove is provided on the slider 1 on one side facing the center of the mounting ring. At least two sliders 1 are symmetrically distributed on each mounting ring. The first screw barrel and the second screw barrel are located between a pair of mounting rings. The pair of mounting rings and the slider on the mounting rings are symmetrically arranged on both sides of the first screw barrel and the second screw barrel. The screw barrel is set outside the second screw barrel and is screwed and coaxial with the second screw barrel. The first screw barrel is coaxially fixedly connected to the driving ring in one of the mounting rings, and the second screw barrel is coaxially fixedly connected to the driving ring in the other mounting ring. The first screw barrel and the second screw barrel are coaxially sleeved and only axially slidably installed with a circular ring. The outer circumferential surface of the circular ring is provided with a coaxial annular groove 2, and a gear ring is coaxially fixedly installed in the second annular groove; A mounting cylinder is located between the pair of mounting rings and is coaxial with the mounting rings, wherein the mounting cylinder is detachably fixedly connected to the inner wall of the mounting cavity; The telescopic rod is fixedly connected to the mounting tube, and the telescopic ends of the telescopic rod are respectively fixedly connected to a mounting ring; A pair of private service motors are fixedly connected to the mounting cylinder, and the private service motors are connected with gears. The gear of one private service motor extends into the annular groove 2 of one of the circular rings and meshes with the gear ring, and the gear of the other private service motor extends into the annular groove 2 of the other circular ring and meshes with the gear ring. The groove width of the annular groove 2 is equal to the thickness of the gear. The pair of private service motors drive screw barrels 1 and 2 to rotate in opposite directions, and the rotation speeds of the driving rings in the two mounting rings are the same. The private service motors have a braking function.

[0009] In one embodiment, a regular polygonal positioning body and a positioning side wall are provided on the spindle motor, the positioning side wall is located on both sides of the regular polygonal positioning body, and the regular polygonal positioning body, the spindle motor, and the mounting ring are coaxial; A pair of private service motors drive screw barrel 1 and screw barrel 2 to rotate in opposite directions, driving the slots of all sliders 1 on a pair of mounting rings to be connected with the regular polygon positioning body at the same time. When the slots of all sliders 1 contact the outer wall of the regular polygon positioning body at the same time, the side walls of all sliders 1 on a pair of mounting rings contact the positioning side walls on both sides of the regular polygon positioning body respectively.

[0010] In one embodiment, the outer diameters of the gear rings on the two rings are equal.

[0011] In one embodiment, a retaining ring is provided at the notch of the annular groove 1, and the retaining ring is coaxially and detachably fixedly connected to the mounting ring.

[0012] In one embodiment, a slide rail extending along the axial direction of the screw barrel 1 is arranged on the outer circumferential surface of the screw barrel 1 and the screw barrel 2, the ring is slidably connected to the slide rail, and a limit block is arranged at one end of the slide rail.

[0013] In one embodiment, a power receiving sheet is provided on the side of the spindle motor facing the bottom of the mounting cavity, a conductive spring is installed at the bottom of the mounting cavity, and the power receiving sheet contacts the conductive spring and squeezes the conductive spring to expand and contract along the axial direction of the spindle motor.

[0014] In one embodiment, a rubber dust ring is provided at the cavity opening of the installation cavity, the spindle motor passes through the rubber dust ring and is in close contact with the inner circumferential surface of the rubber dust ring, and the outer circumferential surface of the rubber dust ring is sealed and connected to the cavity wall of the installation cavity.

[0015] Beneficial effect: The AC swing head of the present application has a built-in fan, which cools the spindle motor by air. When the spindle motor works for a long time and the temperature of the machine body is high, the AC swing head can automatically replace the spindle motor to continue working, which does not delay too much processing time and has little impact on the processing efficiency of the machine tool. Since the AC swing head adopts a structural design form in which the spindle motor can be automatically replaced, the spindle motor does not need to be provided with a water-cooled or air-cooled cooling structure, and maintenance is simple and convenient, saving time and effort, and low labor costs. The AC swing head of the present application can detachably clamp and fix the spindle motor through a motor clamp. The screw barrel 1 and the screw barrel 2 in the motor clamp rotate in opposite directions to drive the slider 1 to move obliquely close to the spindle motor, while contacting the positioning side wall of the spindle motor and the outer wall of the regular polygon positioning body at the same time to clamp and fix the spindle motor. This fixing method avoids contact friction between the slider 1 and the spindle motor, which causes wear of the contact part between the slider 1 and the spindle motor and affects the assembly accuracy of the spindle motor, thereby ensuring that the position accuracy of the replaced spindle motor does not decrease and the machining accuracy of the machine tool remains at a high level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of an AC swing head with a replaceable spindle motor according to the present invention; Figure 2 yes Figure 1 Schematic diagram after removing the spindle motor; Figure 3 yes Figure 2 AA section view in; Figure 4 yes Figure 3 Schematic diagram after installing the spindle motor; Figure 5 It is a schematic diagram of the structure of the spindle motor; Figure 6 This is a schematic diagram of the placement of the spindle motor; Figure 7 It is the front view of the motor holder; Figure 8 yes Figure 7 Schematic diagram after installing the spindle motor; Fig. 9 It is the left side view of the motor holder; Fig.10 yes Fig. 9 BB section view in; Fig.11 yes Fig.10 The enlarged view of part E in FIG. Fig.12 yes Fig.10 Schematic diagram after installing the spindle motor; Fig.13 It is the front view of the mounting ring; Fig.14 is the rear view of the mounting ring; Fig.15 yes Fig.13 CC section view in; Fig.16 yes Fig.15 The enlarged view of the F part in the figure; Fig.17 is a top view of the mounting ring; Fig.18 yes Fig.17 DD section view in; Fig.19 yes Fig.18 Schematic diagram of the slider in the figure moving radially and engaging with the regular polygonal positioning body.

[0018] The following are the descriptions of the reference numerals: 1. Swing head frame; 2. C-axis cylinder; 3. A-axis rotating body; 4. Installation cavity; 5. Spindle motor; 51. Power receiving plate; 52. Regular polygon positioning body; 53. Conductive spring; 54. Positioning side wall; 6. Motor holder; 61. Mounting ring; 62. Annular groove 1; 63. Driving ring; 64. Sliding hole; 65. Sliding block 1; 66. Retaining ring; 67. Spiral groove; 68. Slot; 69. Screw barrel 2; 70. Screw barrel 1; 71. Slide rail; 72. Limit block; 73. Ring; 74. Gear; 75. Private service motor; 76. Annular groove 2; 77. Gear ring; 78. Fixed rod; 79. Movable rod; 80. Mounting barrel; 81. Sliding block 2; 7. Cutting tool; 8. Rubber dust ring; 9. Fan; 10. Temperature sensor; 11. Rack. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The present invention proposes an AC swing head with a replaceable spindle motor. The AC swing head has a built-in fan 9, and the spindle motor 5 is cooled by air through the fan 9. When the spindle motor 5 works for a long time and the body temperature is high, the AC swing head can automatically replace the spindle motor 5 to continue working, without delaying too much processing time, and has little impact on the processing efficiency of the machine tool. Since the AC swing head adopts a structural design form in which the spindle motor 5 can be automatically replaced, the spindle motor 5 does not need to be provided with a water-cooling or air-cooling cooling structure, and maintenance is simple and convenient, saving time and effort, and having low labor costs.

[0024] Specifically, in one embodiment of the invention, Figure 1-Figure 4 As shown, the AC swing head of the replaceable spindle motor includes a swing head frame 1 and a C-axis cylinder 2 and an A-axis rotating body 3 arranged on the swing head frame 1. As is known, the C-axis cylinder 2 is used to drive the swing head frame 1 to rotate around the C-axis, and the A-axis rotating body 3 rotates around the A-axis on the swing head frame 1.

[0025] In this embodiment, if Figure 1-Figure 4 As shown, one end of the A-axis rotating body 3 is recessed inward to form a mounting cavity 4, and a motor holder 6, a spindle motor 5, a fan 9, and a temperature sensor 10 are arranged in the mounting cavity 4. Figure 4 , Figure 8 and Fig.12As shown, the spindle motor 5 passes through the motor holder 6 and is coaxial with the motor holder 6 . The spindle motor 5 and the motor holder 6 are detachably fixedly connected. This design facilitates the replacement of the spindle motor 5 .

[0026] Specifically, the motor holder 6 is fixedly connected to the inner wall of the mounting cavity 4; preferably, the motor holder 6 is detachably fixedly connected to the inner wall of the mounting cavity 4. This design facilitates the disassembly, maintenance and replacement of the motor holder 6. Figure 7-Figure 19 As shown, the motor holder 6 includes: a pair of coaxial and spaced mounting rings 61, a slider 65, a screw barrel 70 and a screw barrel 69, a mounting barrel 80, a telescopic rod, and a pair of private service motors 75. The side of each mounting ring 61 facing the other mounting ring 61 is provided with an annular groove 62 coaxial with the mounting ring 61, as shown in FIG. Fig.15 As shown, a driving ring 63 is rotatably mounted in the annular groove 62, and the driving ring 63 and the mounting ring 61 are coaxial. Fig.18 and Fig.19 As shown, a spiral groove 67 is provided on the end surface of the driving ring 63 close to the bottom of the annular groove 62 , and the spiral groove 67 and the driving ring 63 are coaxial.

[0027] Further, such as Fig.14 and Fig.15 As shown, a retaining ring 66 is provided at the notch of the annular groove 62, and the retaining ring 66 is coaxially detachably fixedly connected to the mounting ring 61. The retaining ring 66 is designed to prevent the driving ring 63 in the annular groove 62 from axial movement, so that the driving ring 63 can rotate reliably in the annular groove 62.

[0028] In this embodiment, if Fig.15 , Fig.18 and Fig.19 As shown, the slider 1 65 slides radially along the mounting ring 61 and penetrates and is installed in the mounting ring 61. Fig.15 As shown, the mounting ring 61 is provided with a sliding hole 64, the sliding block 65 is slidably mounted in the sliding hole 64, and the sliding hole 64 is connected to the bottom of the annular groove 62, as shown in FIG. Fig.16 As shown, a slider 2 81 is fixed on the slider 1 65, and the slider 2 81 is located in the spiral groove 67 and is slidably connected to the spiral groove 67. In this design, the driving ring 63 rotates to make the slider 2 81 slide along the spiral groove 67 to drive the slider 1 65 to slide radially along the mounting ring 61 in the sliding hole 64 to approach or move away from the spindle motor 5. A clamping groove 68 is provided on the side of the slider 1 65 facing the center of the mounting ring 61. After the slider 1 65 approaches the spindle motor 5, the spindle motor 5 is clamped and fixed by the clamping groove 68, as shown in FIG. Figure 7-Figure 19 As shown, each mounting ring 61 is provided with at least two sliders 65 which are centrally symmetrically distributed, and the two sliders 65 are close to each other to clamp and fix the spindle motor 5.

[0029] Specifically, Figure 5 As shown, the spindle motor 5 is provided with a regular polygon positioning body 52 and a positioning side wall 54, and the positioning side wall 54 is located on both sides of the regular polygon positioning body 52. Figure 4 and Fig.12 As shown, the regular polygon positioning body 52, the spindle motor 5, and the mounting ring 61 are coaxial; Fig.19 As shown, after the slider 65 slides radially along the mounting ring 61 in the sliding hole 64 and approaches the spindle motor 5, the slot 68 is aligned with the outer wall of the regular polygonal positioning body 52 and is connected by snapping. The purpose of setting the regular polygonal positioning body 52 on the spindle motor 5 is to facilitate the slider 65 to clamp and fix the spindle motor 5 with the help of the slot 68.

[0030] In this embodiment, if Fig.10 As shown, the screw barrel 1 70 and the screw barrel 2 69 are located between a pair of mounting rings 61, and the pair of mounting rings 61 and the slider 1 65 on the mounting rings 61 are symmetrically arranged on both sides of the screw barrel 1 70 and the screw barrel 2 69. The screw barrel 1 70 is sleeved outside the screw barrel 2 69 and is screwed to the screw barrel 2 69. The screw barrel 1 70 and the screw barrel 2 69 are coaxial, as shown in FIG. Fig.10 As shown, the screw barrel 1 70 is coaxially fixedly connected to the drive ring 63 in the left mounting ring 61, and the screw barrel 2 69 is coaxially fixedly connected to the drive ring 63 in the right mounting ring 61. In this design, the screw barrel 1 70 and the screw barrel 2 69 rotate in the same speed and opposite directions to drive the drive rings 63 on the two mounting rings 61 to rotate in the same speed and opposite directions, and then drive the sliders 1 65 on the two mounting rings 61 to move closer to the spindle motor 5 with the help of the spiral groove 67 and the slide hole 64. That is, Fig.18 Move the slider in the Fig.19 In the position shown, the multiple sliders 1 65 on each mounting ring 61 clamp the regular polygon positioning body 52 through the clamping groove 68 to clamp the spindle motor 5. In addition, when the screw barrel 1 70 and the screw barrel 2 69 rotate in opposite directions at the same speed, the two mounting rings 61 are driven to move axially away from each other. By reasonably designing the thread pitch of the screw barrel 1 70 and the screw barrel 2 69, the pitch of the spiral groove 67, and the initial position of the slider 1 65, it can be achieved that the clamping groove 68 contacts the outer wall of the regular polygon positioning body 52 while the side wall of the slider 1 65 contacts the positioning side wall 54. This design is as follows. Figure 5 , Figure 8 and Fig.12As shown, the sliders 65 on the two mounting rings 61 respectively contact the positioning side walls 54 on both sides of the regular polygon positioning body 52, and the clamping groove 68 clamps the regular polygon positioning body 52 at the same time, so that the spindle motor 5 can be firmly clamped and fixed, and there will be no problem of the slider 65 sliding against the outer wall of the regular polygon positioning body 52, thereby improving the clamping degree of the spindle motor 5 and ensuring that the spindle motor 5 will not move axially under the clamping and fixing of the motor clamp 6. The positioning side walls 54 are located on both sides of the regular polygon positioning body 52, and the two positioning side walls 54 respectively contact the side walls of the sliders 65 on the two mounting rings 61, effectively preventing the spindle motor 5 from moving axially after the sliders 65 clamp the spindle motor 5, and the motor clamp 6 firmly clamps the spindle motor 5. It is reliable and effective. Secondly, the slider 65 is in contact with the outer wall and the positioning side wall 54 of the regular polygon positioning body 52 at the same time, which avoids the slider 65 sliding against the outer wall or the positioning side wall 54 of the regular polygon positioning body 52 during the process of the motor clamp 6 clamping and fixing the spindle motor 5, causing wear on the contact part between the slider 65 and the spindle motor 5, and then affecting the assembly accuracy of the spindle motor 5. Therefore, the design that the slot 68 contacts the outer wall of the regular polygon positioning body 52 while the side wall of the slider 65 contacts the positioning side wall 54 can ensure that the slider 65 will not be worn after repeated use, ensure that the position accuracy of the replaced spindle motor 5 is not reduced, and ensure that the assembly accuracy of the spindle motor 5 is not reduced, so that the AC swing head can smoothly carry out the frequent replacement of the spindle motor 5.

[0031] The AC swing head of this embodiment can detachably clamp and fix the spindle motor 5 through the motor clamp 6. The screw barrel 1 70 and the screw barrel 2 69 in the motor clamp 6 rotate in opposite directions to drive the slider 1 65 to move obliquely close to the spindle motor 5, while contacting the positioning side wall 54 of the spindle motor 5 and the outer wall of the regular polygon positioning body 52 to clamp and fix the spindle motor 5. This fixing method avoids contact friction between the slider 1 65 and the spindle motor 5, which causes wear of the contact part between the slider 1 65 and the spindle motor 5 and affects the assembly accuracy of the spindle motor 5, thereby ensuring that the position accuracy of the replaced spindle motor 5 does not decrease and the machining accuracy of the machine tool remains at a high level.

[0032] In this embodiment, if Fig.10 and Fig.11 As shown, the outer sides of the screw barrel 1 70 and the screw barrel 2 69 are coaxially sleeved with a ring 73, and the ring 73 slides axially on the screw barrel 1 70 and the screw barrel 2 69. The outer circumferential surfaces of the screw barrel 1 70 and the screw barrel 2 69 are provided with a slide rail 71 extending along the axial direction of the screw barrel 1 70. The ring 73 is slidably connected to the slide rail 71. This design ensures that the ring 73 slides axially on the screw barrel 1 70 and the screw barrel 2 69. A limit block 72 is provided at one end of the slide rail 71. This design prevents the ring 73 from separating from the slide rail 71. Fig.11As shown, a coaxial annular groove 76 is provided on the outer circumferential surface of the circular ring 73, and a gear ring 77 is coaxially fixedly installed in the annular groove 76. The private service motor 75 is connected to a gear 74, and the gear 74 of one private service motor 75 extends into the annular groove 76 of one of the circular rings 73 and meshes with the gear ring 77, and the gear 74 of the other private service motor 75 extends into the annular groove 76 of the other circular ring 73 and meshes with the gear ring 77. The gear 74 is driven by the servo motor. The ring 77 drives the ring 73 to rotate, and the rotation of the ring 73 drives the screw barrel 69 and the screw barrel 1 70 to rotate. The groove width of the annular groove 2 76 is equal to the thickness of the gear 74. In this design, the ring 73 can be limited by the gear 74, so that the ring 73 does not follow the axial movement of the screw barrel 1 70 and the screw barrel 2 69, and at the same time, the servo motor can continuously and reliably drive the screw barrel 1 70 and the screw barrel 2 69 to rotate, and the transmission process is not affected by the axial movement of the screw barrel 1 70 and the screw barrel 2 69. Fig.10 As shown, a pair of servo motors 75 drive screw barrel 1 70 and screw barrel 2 69 to rotate in opposite directions, and the rotation speeds of the drive rings 63 in the two mounting rings 61 are the same. This design can ensure that the sliders 1 65 on the two mounting rings 61 move synchronously and contact with the spindle motor 5 at the same time, and then the spindle motor 5 is firmly clamped and fixed. Preferably, the outer diameters of the gear rings 77 on the two circular rings 73 are equal. This design can also make the rotation speeds of the two servo motors equal. The servo motor 75 has a braking function. This design can prevent the gear ring 77, screw barrel 1 70, screw barrel 2 69, and drive ring 63 from accidentally rotating under the impact of vibrations generated during the process of machining parts on the machine tool, causing the clamping force of the slider 1 65 on the spindle motor 5 to change, affecting the clamping positioning accuracy of the spindle motor 5. Of course, the transmission matching design of the spiral groove 67 on the drive ring 63 and the slider 2 81 can also prevent the slider 1 65 from accidentally sliding on its own.

[0033] In this embodiment, if Fig.10 As shown, the mounting tube 80 is located between a pair of mounting rings 61 and is coaxial with the mounting rings 61. Figure 4 As shown, the installation tube 80 is detachably fixedly connected to the inner wall of the installation cavity 4, and is necessarily fixedly connected by threaded connection or screws.

[0034] In this embodiment, if Fig.10As shown, the telescopic rod includes a fixed rod 78 and a movable rod 79 axially inserted at both ends of the fixed rod 78, the fixed rod 78 is fixedly connected to the mounting tube 80, and the two movable rods 79 are respectively fixedly connected to a mounting ring 61, and the mounting ring 61 is prevented from rotating with the screw barrel 2 69 and the screw barrel 1 70 by the telescopic rod, so that the mounting ring 61 can only move axially to ensure that the driving ring 63 can smoothly drive the slider 1 65 to slide, and a pair of servo motors 75 are fixedly connected to the mounting tube 80 or the fixed rod 78. The servo motor has a fast response speed and high control accuracy, which is conducive to accurately controlling the slider 1 65 to clamp and fix the replaced spindle motor 5 to ensure the position accuracy of the spindle motor 5.

[0035] In this embodiment, the spindle motor 5 is detachably electrically connected to the A-axis rotating body 3. This design facilitates the replacement of the spindle motor 5 and the replacement spindle motor 5 to draw power from the A-axis rotating body 3. Specifically, Figure 4 and Figure 5 As shown, a power receiving sheet 51 is provided on the side of the spindle motor 5 facing the bottom of the mounting cavity 4, and a conductive spring 53 is installed at the bottom of the mounting cavity 4. The power receiving sheet 51 contacts the conductive spring 53 and squeezes the conductive spring 53 to extend and retract along the axial direction of the spindle motor 5. This design can ensure that the spindle motor 5 can reliably draw power from the A-axis rotating body 3, and at the same time facilitate the disassembly and replacement of the spindle motor 5.

[0036] In this embodiment, if Figure 4 As shown, the fan 9 blows air to the spindle motor 5 to cool the spindle motor 5; the temperature sensor 10 is in contact with the spindle motor 5 to detect the operating temperature of the spindle motor 5. Figure 4 As shown in the figure, when the spindle motor 5 drives the tool 7 to work for a long time and causes the spindle motor 5 to overheat and need to be stopped for cooling, the five-axis linkage CNC machine tool first controls the AC swing head to move to Figure 6The frame 11 shown is used to place multiple spindle motors 5 for replacement of AC swing heads. The frame 11 can usually be set inside or around the machine tool. Once the spindle motor 5 body is overheated and needs to be shut down for heat dissipation, the five-axis linkage CNC machine tool controls the AC swing head to move to the frame 11, and at the same time controls the A-axis rotating body 3 to rotate until the spindle motor 5 is vertical, and then the machine tool lowers the spindle motor 5 on the AC swing head to the frame 11, and then the machine tool controls the private service motor 75 to move the slider 65 to release the clamping of the spindle motor 5, and then the machine tool controls the AC swing head to move vertically upward to separate from the spindle motor 5, and then the machine tool controls the AC swing The head moves to just above the other spindle motor 5 on the frame 11, and then the machine tool controls the AC swing head to descend so that the spindle motor 5 is inserted into the installation cavity 4. After the AC swing head descends into place, the private service motor 75 is controlled to move so that the slider 65 clamps the spindle motor 5. Then the machine tool controls the AC swing head to leave the frame 11 to complete the replacement of the spindle motor 5. The AC swing head can automatically replace the spindle motor 5 and continue to work under the control of the machine tool. No manual replacement is required, which saves time and effort, shortens the replacement time, does not delay too much processing time, and has little impact on the processing efficiency of the machine tool. More importantly, compared with liquid-cooled spindle motors, it is simple and convenient to maintain and has low cost.

[0037] It should be noted that the spindle motor 5 placed vertically on the frame 11 does not have the tool 7, because the well-known tool 7 and the spindle motor 5 are detachably connected, and the five-axis linkage CNC machine tool can control the spindle motor 5 to automatically replace the tool 7 as needed. This belongs to the prior art, so this article will no longer elaborate on how the CNC machine tool controls the spindle motor 5 to automatically replace the tool 7. Therefore, after the AC swing head completes the replacement of the spindle motor 5, a new tool 7 can be replaced to continue processing the workpiece.

[0038] Further, such as Figure 4 As shown, a rubber dust-proof ring 8 is provided at the cavity opening of the installation cavity 4, the spindle motor 5 passes through the rubber dust-proof ring 8 and is in close contact with the inner circumferential surface of the rubber dust-proof ring 8, and the outer circumferential surface of the rubber dust-proof ring 8 is sealed and connected to the cavity wall of the installation cavity 4. This design will not affect the replacement of the spindle motor 5, and can prevent foreign dust, metal chips and other debris from entering the installation cavity 4 to affect the replacement operation of the spindle motor 5 and the installation accuracy of the spindle motor 5.

[0039] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An AC swing head with a replaceable spindle motor, comprising a swing head frame, a C-axis cylinder and an A-axis rotating body arranged on the swing head frame, characterized in that: One end of the A-axis rotating body is recessed inward to form an installation cavity, and a motor holder, a spindle motor, a fan, and a temperature sensor are arranged in the installation cavity; The motor holder is fixedly connected to the inner wall of the installation cavity; The spindle motor passes through the motor holder and is coaxial with the motor holder. The spindle motor and the motor holder are detachably fixedly connected. The spindle motor is detachably electrically connected to the A-axis rotating body. The fan blows air toward the spindle motor to cool the spindle motor; The temperature sensor is in contact with the spindle motor and is used for detecting the working temperature of the spindle motor.

2. An AC swing head with replaceable spindle motor as claimed in claim 1, characterized in that: The motor holder comprises: A pair of coaxial and spaced mounting rings, each mounting ring having a side surface facing the other mounting ring provided with an annular groove coaxial with the mounting ring, a driving ring self-rotatingly mounted in the annular groove, the driving ring and the mounting ring being coaxial, a spiral groove being provided on an end surface of the driving ring close to the bottom of the annular groove, the spiral groove being coaxial with the driving ring; Slider 1 is radially slidable along the mounting ring and is installed in the mounting ring. Slider 2 is fixed on the slider 1. Slider 2 is located in the spiral groove and is slidably connected with the spiral groove. The driving ring rotates to make slider 2 slide along the spiral groove and drive slider 1 to slide radially along the mounting ring. A clamping groove is provided on the slider 1 on one side facing the center of the mounting ring. At least two sliders 1 are symmetrically distributed on each mounting ring. The first screw barrel and the second screw barrel are located between a pair of mounting rings. The pair of mounting rings and the slider on the mounting rings are symmetrically arranged on both sides of the first screw barrel and the second screw barrel. The screw barrel is set outside the second screw barrel and is screwed and coaxial with the second screw barrel. The first screw barrel is coaxially fixedly connected to the driving ring in one of the mounting rings, and the second screw barrel is coaxially fixedly connected to the driving ring in the other mounting ring. The first screw barrel and the second screw barrel are coaxially sleeved and only axially slidably installed with a circular ring. The outer circumferential surface of the circular ring is provided with a coaxial annular groove 2, and a gear ring is coaxially fixedly installed in the second annular groove; A mounting cylinder is located between the pair of mounting rings and is coaxial with the mounting rings, wherein the mounting cylinder is detachably fixedly connected to the inner wall of the mounting cavity; The telescopic rod is fixedly connected to the mounting tube, and the telescopic ends of the telescopic rod are respectively fixedly connected to a mounting ring; A pair of private service motors are fixedly connected to the mounting cylinder, and the private service motors are connected with gears. The gear of one private service motor extends into the annular groove 2 of one of the circular rings and meshes with the gear ring, and the gear of the other private service motor extends into the annular groove 2 of the other circular ring and meshes with the gear ring. The groove width of the annular groove 2 is equal to the thickness of the gear. The pair of private service motors drive screw barrels 1 and 2 to rotate in opposite directions, and the rotation speeds of the driving rings in the two mounting rings are the same. The private service motors have a braking function.

3. An AC swing head with replaceable spindle motor as claimed in claim 2, characterized in that: The spindle motor is provided with a regular polygon positioning body and a positioning side wall, the positioning side wall is located on both sides of the regular polygon positioning body, and the regular polygon positioning body, the spindle motor and the mounting ring are coaxial; A pair of private service motors drive screw barrel 1 and screw barrel 2 to rotate in opposite directions, driving the slots of all sliders 1 on a pair of mounting rings to be connected with the regular polygon positioning body at the same time. When the slots of all sliders 1 contact the outer wall of the regular polygon positioning body at the same time, the side walls of all sliders 1 on a pair of mounting rings contact the positioning side walls on both sides of the regular polygon positioning body respectively.

4. The AC swing head with replaceable spindle motor as claimed in claim 2, characterized in that: The outer diameters of the gear rings on the two rings are equal.

5. The AC swing head with replaceable spindle motor as claimed in claim 2, characterized in that: The notch of the annular groove 1 is provided with a retaining ring, and the retaining ring is coaxially detachably fixedly connected with the mounting ring.

6. The AC swing head with replaceable spindle motor as claimed in claim 2, characterized in that: The outer circumferential surfaces of the screw barrels 1 and 2 are provided with slide rails extending along the axial direction of the screw barrel 1, the ring is slidably connected to the slide rails, and a limiting block is provided at one end of the slide rails.

7. The AC swing head with replaceable spindle motor as claimed in claim 1, characterized in that: A power receiving sheet is arranged on one side of the spindle motor facing the bottom of the mounting cavity, a conductive spring is installed at the bottom of the mounting cavity, and the power receiving sheet contacts the conductive spring and squeezes the conductive spring to expand and contract along the axial direction of the spindle motor.

8. The AC swing head with replaceable spindle motor as claimed in claim 1, characterized in that: The cavity opening of the installation cavity is provided with a rubber dust isolation ring, the spindle motor passes through the rubber dust isolation ring and is in close contact with the inner circumferential surface of the rubber dust isolation ring, and the outer circumferential surface of the rubber dust isolation ring is sealed and connected to the cavity wall of the installation cavity.

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